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ACKNOWLEDGMENTS

This research used samples and/or data provided by the International

Ocean Discovery Program (IODP), which was sponsored by the

U.S. National Science Foundation and participating countries under

management of Joint Oceanographic Institutions, Inc., and its

predecessors—the (Integrated) Ocean Drilling Program and the

Deep Sea Drilling Program. We thank theJOIDES Resolutioncrew of

IODP Expedition 342 and W. Hale and A. Wuelbers for help with

sampling. We also thank the many centers and staff scientists who

enabled the measurements, including L. Elder in the Hull laboratory

(Yale University), B. Erkkila and M. Wint at the Yale Analytical

and Stable Isotope Center, D. Andreasen at the UCSC Stable Isotope

Laboratory, and F. Demory (CEREGE) for help with magnetic data

production and processing. This work benefited from helpful

discussions with J. Dinarès-Turell, the insights of C. B. Keller, and the

comments of four anonymous reviewers.Funding:IODP USSSP

Post-Expedition Activity award and Yale University support to

P.M.H.; Deutsche Forschungsgemeinschaft (DFG) funding

(grants BO2505/8-1 and EH 89/20-2) to A.B.; Yale Peabody

Museum support to M.J.H.; Spanish Ministry of Economy

and Competitiveness and FEDER funds (CGL2017-84693-R) to L.A.;

DFG funding (grant VO687/14) to S.J.B.; a Richard Foster Flint

Postdoctoral Fellowship (Department of Geology and Geophysics,

Yale University) to D.E.P.; DFG funding (grant number FR2544/2) to

O.F.; NSF funding (EAR-132552) and American Chemical Society

Petroleum Research Fund (grant PRF#52822-DN18) to D.J.P.; DFG

funding (grants RO1113/3, RO1113/4, and RO1113/8) to U.R.;

the NASA Exobiology Program (grant NNX09AM88G) to R.E.S.; the

Danish Council for Independent Research/Natural Sciences

(DFF/FNU) (grant 11-107497) to K.K.Ś.; NSF funding (OCE 1536611)

to E.T.; DFG funding (grant WE5479/3) to T.W.; and a NERC

(NE/K006800/1) and Royal Society Wolfson award to P.A.W.Author

contributions:P.M.H. conceived and co-led the study, drafted

the manuscript, contributed to model design, generated empirical

data, and edited data tables and figures. A.B. co-led the study;

coordinated data generation, reporting, figures, and tables; generated

empirical data; and substantially contributed to study design and

text. D.E.P. led LOSCAR modeling and substantially contributed to

study design and text. M.J.H. compiled and aligned age models for the

global temperature compilation, prepared related tables and figures,

and substantially contributed to study design and text. R.D.N.,

P.A.W, and P.B. led IODP Expedition 342, with R.D.N. and P.A.W.

substantially contributing to study design and text. L.A., S.J.B., P.R.B.,

T.J.B., C.C., A.D., B.D., O.F., S.J., H.K., D.K., P.C.L., D.L., I.M., K.M.,

D.J.P., G.E.R., U.R., J.S., J.D.S., E.C.S., K.K.Ś., R.E.S., E.T., T.W., J.H.W.,

and T.Y. contributed empirical datasets, figures, and related analyses,

interpretations, and text. L.A., P.R.B., T.J.B., O.F., D.K., P.F.S., J.S.,

E.T., T.W., J.H.W., and J.C.Z. substantially contributed to ideas and/or

text. All authors read and approved the final text. The primary

contribution of R.D.N., P.A.W., P.B., S.J.B., P.R.B., C.C., A.D., O.F., S.J.,

H.K., P.C.L., D.L., I.M., K.M., G.E.R., U.R., J.S., P.F.S., E.C.S., K.K.Ś.,

R.E.S., T.W., J.H.W., and T.Y. was the IODP Expedition 342 K/Pg

boundary investigation. In the byline, the first seven authors appear

in order of contribution; all others are listed alphabetically.

Competing interests:The authors have no competing interests.

Data and materials availability:All data are available in the

manuscript and the supplementary materials.

SUPPLEMENTARY MATERIALS

science.sciencemag.org/content/367/6475/266/suppl/DC1

Materials and Methods

Supplementary Text

Figs. S1 to S44

Tables S1 to S31

References

24 June 2019; accepted 5 December 2019

10.1126/science.aay5055

Hullet al.,Science 367 , 266–272 (2020) 17 January 2020 7of7

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